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[post_content] => Abstract: Mars, with its thin carbon dioxide atmosphere and dusty surface, provides a remarkable window into the physics of planetary climates. Dust is central to the Martian environment—it controls how sunlight is absorbed and scattered, shapes weather patterns, and can even trigger planet-wide storms. Over my career, I have sought to understand how this ever-present dust influences Mars’s atmosphere, from its role in generating electrical activity and lightning during storms to its connection with trace gas variability. Small-scale phenomena such as dust devils also contribute to maintaining the planet’s dusty skies. In this talk, I will explore how these interlinked processes reveal the dynamic nature of the Martian atmosphere and what they teach us about the broader physics of planetary climates.
About the Speaker: Professor Varun Sheel is Senior Professor and Head of the Planetary Science Division at the Physical Research Laboratory (an autonomous unit of the Department
of Space, Government of India), Ahmedabad. He is an internationally recognized scientist in the field of planetary atmospheres, with research spanning the climates of Earth, Mars, and Venus. His work focuses on the physical and chemical processes that shape planetary atmospheres and their impact on climate, including pioneering contributions to understanding the role of dust in the Martian atmosphere.
Prof. Sheel holds leading positions in international scientific bodies. He is currently Vice Chair of Commission B4 (Terrestrial Planets) of COSPAR (Committee on Space Research, France) and an elected member of the International Commission on Planetary Atmospheres and their Evolution (ICPAE, Germany). He previously served as President of the Planetary Science Section of AOGS
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He is the Founding Secretary of the Indian Planetary Science Association (IPSA), established in 2023, and plays an active role in building India’s planetary science community. Prof. Sheel is closely involved with India’s upcoming planetary missions – he is Co-Principal Investigator of the Radio Occultation Experiment for future Venus mission. As an academician, Prof. Sheel teaches at various levels of higher education. He has designed and taught postgraduate courses on Atmospheric Science and Numerical Methods, and introduced the first full-credit course on Planetary Atmospheres at IIT Gandhinagar. He has also guided PhD students on the climates of Mars and Venus, contributing to the training of the next generation of planetary scientists in India.
We look forward to your active participation.
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[post_content] => Abstract: Mars, with its thin carbon dioxide atmosphere and dusty surface, provides a remarkable window into the physics of planetary climates. Dust is central to the Martian environment—it controls how sunlight is absorbed and scattered, shapes weather patterns, and can even trigger planet-wide storms. Over my career, I have sought to understand how this ever-present dust influences Mars’s atmosphere, from its role in generating electrical activity and lightning during storms to its connection with trace gas variability. Small-scale phenomena such as dust devils also contribute to maintaining the planet’s dusty skies. In this talk, I will explore how these interlinked processes reveal the dynamic nature of the Martian atmosphere and what they teach us about the broader physics of planetary climates.
About the Speaker: Professor Varun Sheel is Senior Professor and Head of the Planetary Science Division at the Physical Research Laboratory (an autonomous unit of the Department
of Space, Government of India), Ahmedabad. He is an internationally recognized scientist in the field of planetary atmospheres, with research spanning the climates of Earth, Mars, and Venus. His work focuses on the physical and chemical processes that shape planetary atmospheres and their impact on climate, including pioneering contributions to understanding the role of dust in the Martian atmosphere.
Prof. Sheel holds leading positions in international scientific bodies. He is currently Vice Chair of Commission B4 (Terrestrial Planets) of COSPAR (Committee on Space Research, France) and an elected member of the International Commission on Planetary Atmospheres and their Evolution (ICPAE, Germany). He previously served as President of the Planetary Science Section of AOGS
(Asia Oceania Geosciences Society, Singapore) from 2016–2018, and since 2008 has convened annual sessions on Mars and Venus at AOGS meetings.
He is the Founding Secretary of the Indian Planetary Science Association (IPSA), established in 2023, and plays an active role in building India’s planetary science community. Prof. Sheel is closely involved with India’s upcoming planetary missions – he is Co-Principal Investigator of the Radio Occultation Experiment for future Venus mission. As an academician, Prof. Sheel teaches at various levels of higher education. He has designed and taught postgraduate courses on Atmospheric Science and Numerical Methods, and introduced the first full-credit course on Planetary Atmospheres at IIT Gandhinagar. He has also guided PhD students on the climates of Mars and Venus, contributing to the training of the next generation of planetary scientists in India.
We look forward to your active participation.
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